package main

import (
	"fmt"
	"os"
	"os/signal"
	"syscall"

	"github.com/bwmarrin/discordgo"
	"github.com/joho/godotenv"
)

func main() {
	err := godotenv.Load()
	if err != nil {
		fmt.Println("Error loading .env file")
		return
	}

	botToken := os.Getenv("DISCORD_BOT_TOKEN")
	if botToken == "" {
		fmt.Println("Missing variable in .env")
		return
	}

	// initialize bot session
	dg, err := discordgo.New("Bot " + botToken)
	if err != nil {
		fmt.Println("Error creating Discord session,", err)
		return
	}

	// open WebSocket connection
	dg.AddHandler(readyHandler)
	dg.AddHandler(messageCreate)
	err = dg.Open()
	if err != nil {
		fmt.Println("Error opening connection,", err)
		return
	}

	// wait here until CTRL-C or other term signal is received.
	fmt.Println("Bot is now running.  Press CTRL-C to exit.")
	sc := make(chan os.Signal, 1)
	signal.Notify(sc, syscall.SIGINT, syscall.SIGTERM, os.Interrupt)
	<-sc

	// cleanly close down the Discord session
	dg.Close()
}

func readyHandler(s *discordgo.Session, r *discordgo.Ready) {
	fmt.Println("Ready to rumble!")
}

// This function will be called (due to AddHandler above) every time a new
// message is created on any channel that the authenticated bot has access to.
func messageCreate(s *discordgo.Session, m *discordgo.MessageCreate) {

	// Ignore all messages created by the bot itself
	// This isn't required in this specific example but it's a good practice.
	if m.Author.ID == s.State.User.ID {
		return
	}

	// Ugh message is blank, must be some weird intents thing?
	fmt.Println(m.Author.Username + " sent: " + m.Content)

	// If the message is "ping" reply with "Pong!"
	if m.Content == "ping" {
		s.ChannelMessageSend(m.ChannelID, "Pong!")
	}

	// If the message is "pong" reply with "Ping!"
	if m.Content == "pong" {
		s.ChannelMessageSend(m.ChannelID, "Ping!")
	}
}